sqlserver实现在多个数据库间快速查询某个表信息的方法

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本文实例讲述了sqlserver实现在多个数据库间快速查询某个表信息的方法。分享给大家供大家参考，具体如下：最近出来实习,所在公司的服务器有十几个数据库,为了方便根据某个数据表的表名快速找到对应的数据库,又复习了一下游标的知识,写了下面这个sql代码,方便自己的工作

本文实例讲述了sql server实现在多个数据库间快速查询某个表信息的方法。分享给大家供大家参考，具体如下：

最近出来实习,所在公司的服务器有十几个数据库,为了方便根据某个数据表的表名快速找到对应的数据库,又复习了一下游标的知识,写了下面这个sql代码,方便自己的工作。

1.先了解一下系统存储过程和系统表的使用,简单介绍一下我用到的几个系统存储过程（资料参考网络）

use master --切换到系统数据库,因为下面用到的系统存储过程和系统表大部分存在于该数据库goexec sp_helpdb --查询 当前 服务器的所有数据库select [name] from [sysdatabases] --查询 当前 服务器的所有数据库select * from sysobjects where type = 'u'--列出 当前 数据库里所有的表名select * from information_schema.tables --列出 当前 数据库里所有的表名(执行对比一下与上面这个语句的查询结果)select * from syscolumns where id = object_id('spt_fallback_db') --列出指定表里的所有的信息,包括字段等等(根据需要修改参数)

2.直接上代码（具体请参考注释,纯属学习,有错请指出）

use master --切换到系统数据库,因为下面用到的  系统存储过程和系统表  大部分存在于该数据库go------------------在当前服务器  根据表的名字  在多个数据库进行查询  得到哪个数据库存在该表的信息------------------declare @DataBaseName nvarchar(max) --定义变量(数据库的名字)declare cur cursor for select [name] from [sysdatabases] --定义游标,该游标指向  当前  服务器上的所有数据库名字列表open cur --打开游标create table #TableInfo (table_catalog nvarchar(max),table_schema nvarchar(max),table_name nvarchar(max),table_type nvarchar(max)) --创建临时表用于存储所有数据库的所有表信息fetch next from cur into @DataBaseName --获取游标的数据,相当于获取数据库名字列表的第一条数据while (@@fetch_status=0)beginprint ''print ''print '当前数据库: '+ @DataBaseName --读出每个数据库的名字insert into #TableInfo --把存储过程查询出来的数据插进临时表exec('select table_catalog,table_schema,table_name,table_type from ' + @DataBaseName + '.information_schema.tables') --查询对应数据库的所有表print '--------------------------------------------------------------------------------------------------------------------------------------'fetch next from cur into @DataBaseName --游标移动endclose cur --关闭游标deallocate cur --释放游标print ''print ''print ''print ''print ''declare @TableName nvarchar(max)set @TableName = 'MyTableName' --查询条件(根据需要自行修改)if exists(select table_name from #TableInfo where table_name = @TableName) --查询指定名字的表beginprint '====================当前服务器存在 ' + @TableName + ' 表,相关信息请到结果窗口查看===================='select table_catalog as '所属数据库',table_name as '表名' from #TableInfo where table_name = @TableName --输出表的相关信息,从这些信息就可以知道这个表在哪个数据库endelsebeginprint '--------------------当前服务器不存在 ' + @TableName + ' 表--------------------'enddrop table #TableInfo --删除临时表

更多关于SQL Server相关内容感兴趣的读者可查看本站专题：《SQL Server查询操作技巧大全》、《SQL Server存储过程技巧大全》、《SQL Server索引操作技巧大全》、《SQL Server常用函数汇总》及《SQL Server日期与时间操作技巧总结》

希望本文所述对大家SQL Server数据库程序设计有所帮助。

标签: sqlserver 现在多个数据库快速查询某个信息方法

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sqlserver实现在多个数据库间快速查询某个表信息的方法

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